JPS6372414A - Positioning and holding device for different length work roll of multistep rolling mill - Google Patents

Abstract

PURPOSE:To assemble different length work rolls with good workability and safety by fixing thrust pressing members hav-ing a distribution length compensating in accordance with the length of the work rolls to an access door attached to an operation side door and a driving side door toward the machine inside. CONSTITUTION:An operation side door 7 is opened and upper and lower work rolls 3u, 3d are temporarily put in a multistep rolling mill from the operation side by use of a changing device whose system is a carriage change system. Then, the work rolls 3u, 3d are automatically placed in a prescribed position by completely closing a driving side door 8. the operating side door 7, and an access door 9 attached to the door 7 and locking a lock mechanism. At the time of preparing for rolling by passing a steel strip through the mill or of actual cold rolling, the respective work rolls 3u, 3d are held with out movement in the horizontal thrust direction because a bearing fixed on the top end of thrust pressing members 10, 11 abuts on the ends face of the work rools 3u, 3d and rotates.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is applicable to a multi-high rolling mill used for cold rolling steel strips, when work rolls having different roll lengths (different lengths) are installed. This relates to a device that efficiently and safely incorporates a long work roll into a predetermined position inside a machine with good work efficiency and holds the work roll once installed at a predetermined position within the machine [Prior art] Conventional multi-high rolling mill In , all work role rearranging was done manually. One of the reasons is
This is because the multi-high rolling mill itself was small, and the work rolls were also relatively small and lightweight, making it possible to transport and handle them manually. The second reason is that the shape of the work roll does not have a chock, that is, the diameter of the body in contact with the copper strip, which is the material to be rolled, and its end are cylindrical. This is because it was not possible to use roll changing jigs such as boat bars and hooks as in heavy rolling mills and quadruple rolling mills.

However, as the copper strip that is the material to be rolled becomes wider and the multi-high rolling mill becomes larger, the size and weight of the work rolls also gradually increase, making it extremely difficult to handle them manually as before. Further, even if it could be handled, there were problems such as it significantly impeded workability and efficiency and was accompanied by danger.

In order to solve such problems, for example,
Work roll exchange carts such as those shown in 24530 and Utility Model Publication No. 61-4401 began to be used. In other words, a highly efficient work roll changing device that can easily change the work rolls in a multi-high rolling mill using mechanical force has come to be used.

However, the work rolls that are reassembled using such exchange carts are usually one type of roll length that corresponds to the maximum width steel strip that can be rolled by the multi-high rolling mill. This longest work roll was used to cold-roll everything down to the narrow copper strip.

[Problem that the invention seeks to solve]

However, recently, as mentioned above, rather than cold rolling narrow steel strips by incorporating the longest work roll into a multi-high rolling mill, the roll length has been changed to match that length for narrow steel strips. Cold rolling was started by incorporating short work rolls. This is due to reasons such as lowering the unit price of work rolls and reducing maintenance costs such as roll polishing, but in this way, one multi-high rolling mill can have several types of rolls with different lengths, that is, different lengths. Hold the work role,
Since these work rolls are assembled and held at predetermined positions within the machine before cold rolling is performed, there are problems as described below.

(1) Even if you try to reassemble work rolls of different lengths using the above-mentioned exchange trolley type reassembly device, it is easy to handle, work well, and efficiently in a predetermined position in a narrow machine, and the rolls and copper strips can be reassembled. It was not possible to position the roll without causing any damage, and at best the roll could only be temporarily loaded into the machine, and furthermore, once the roll was installed in a predetermined position, it was not possible to reliably hold the roll in that position.

(2) In order to set the work rolls of different lengths temporarily placed in the machine by the reassembly device into a predetermined position, unsafe manual adjustment work is necessary.

The present invention has been made to solve these problems.

[Means for solving problems]

The present invention is a device that achieves the above object, and the first invention is a device for positioning and holding work rolls of different lengths incorporated in a multi-high rolling mill at predetermined positions inside the machine, the device comprising: A thrust holding member having a distributed length to be compensated according to the length is fixed to the access door and the drive side door provided on the operation side door of the multi-high rolling mill, respectively, facing inward. This is a characteristic feature.

A second invention that further improves the first specific invention is a device for positioning and holding work rolls of different lengths incorporated in a multi-high rolling mill at predetermined positions inside the machine, the length of the work rolls being incorporated. A thrust holding member having a fixed distribution length of the length to be compensated for is on the drive side door, and a thrust holding member connected to a cylinder that can change the distribution length of the length to be compensated on the operating side. It is characterized by being fixed to the access door provided on the door toward the interior of the aircraft.

〔Example〕

1 to 5 show embodiments of the present invention,
The structure and operation of the in-machine positioning and holding device for work rolls of different lengths of a multi-high rolling mill according to the present invention will be explained in more detail based on these drawings.

Figures (a) and ('b) in Figure 1 are front views of main parts showing the work rolls installed in the predetermined positions in the multi-high rolling mill, and the (=) figure shows the case where the longest work roll L is installed. , (1)) The figure shows a case where a work roll L' shorter than the longest work roll L shown in figure (a) is incorporated.

Figures (a) to (d) in Figure 2 show the thrust holding member being attached to the access door provided on the operation side door with the work rolls L and L' installed in the predetermined positions as shown in Figure 1. FIG. 3 is an enlarged explanatory view of the main part showing a fixed state. In Figure 2, (a) and ('b) are the longest work roll L.
(a) is the plan view, (b) is the case where the
The figure shows a front view. In addition, (C) and (d) in Fig. 2 show the case where a short work roll L' is installed, and (C)
) Figure shows a plan view, and Figure (a) shows a front view.

Figures (a) to (d) in Figure 3 show that the work rolls L and L'i are installed in a predetermined position inside the machine as shown in Figure 1, and the thrust holding member is now fixed to the drive side door. FIG. 3A and 3B show the case where the longest work roll L is installed, FIG. 3A shows a plan view, and FIG. 3 shows a front view. 3(C) and 3(d) show the case where a short work roll L' is installed, FIG. 3(C) shows a plan view, and FIG. 3(B) shows a front view.

Figure 4 (a) and middle) show that the longest work roll L is installed in a predetermined position in the multi-stage rolling mill, and the thrust holding member connecting the cylinder is fixed to the access door provided on the operation side door. FIG. 4 is an enlarged explanatory view of the main parts showing the state, where (a) is a plan view, and (c) is a front view. Also, (C) of this figure 4 is A- in (a) of the same figure.
It is an A sectional view.

FIGS. 5(a) and 5(b) show a thrust holding member having a constant length R fixed to the drive side door of a multi-high rolling mill, and a cylinder fixed to an access door provided on the operation side door. FIG. 3 is an enlarged front view of main parts showing a state in which a work roll is installed at a predetermined position inside the machine by working with a thrust holding member.

Figure 5 (a) shows the case where the longest work roll L is installed, while CI))) shows the difference in roll length when the work roll L', which is shorter than the longest work roll L, is installed. A state in which compensation is performed by stroke S is shown.

Now, generally speaking, a multi-high rolling mill cold-rolls a copper strip, which is a wave-rolled material, as an example thereof is shown in the schematic explanatory diagram of FIG. 6.

In Fig. 6, this shows a 20-high Sendzimir mill among the multi-high rolling mills, where 1 is the main body of the multi-high rolling mill, 2 is a steel strip, 3u and 3d are upper and lower work rolls,
4 is a first intermediate roll, 5 is a second intermediate roll, and 6 is a bank unroll.

Still, 7 and 8 are opening/closing doors, which are on the operating side and the driving side. 9 is an access door provided at the end of the operation side door. Then, the steel strip 2 is applied with an appropriate tension and is cold-rolled by the upper and lower work rolls 3u and 3d while being reversed from side to side on the paper.

In the multi-high rolling mill that cold-rolls steel strips as described above,
Parts related to the first invention described above will be explained below with reference to FIGS. 1 to 3.

In the figure, 10 is an access door 9 provided on the operation side door 7.
A thrust presser member 11 is fixed to the drive side door 8 with bolts 13 toward the inside of the machine. 1
2 is a thrust holding member 10.11 on the operation side and drive side.
is provided at the tip of the upper and lower work rolls 3u, 3.
(This is a bearing that rotates in contact with the end surface. 14 is a locking mechanism for the access door 9, which is provided on the operation side door 7 and opens and closes.

When the longest work rolls 3u and 3d with roll length L are installed in the multi-high rolling mill main body 1, the first
As shown in (a) of Figure 2, (a), (1)) of Figure 2, and (a), ('b) of Figure 3, X is on the operation side and Y is on the drive side. Thrust holding member 1 having a length
0.11 is fixed to each door to position the longest work roll L at a predetermined position inside the machine and hold it so that it does not move in the horizontal thrust direction.

In this case, the compensation length (x-4-y) necessary to position the longest work roll L at a predetermined position inside the machine and its distribution lengths X, Y are calculated from the model and structural dimensions of the multi-high rolling mill. All you have to do is ask.

On the other hand, if a work roll L' that is shorter than the longest work roll L is installed, (b) in Figure 1, ((ri) in Figure 2, (d) and (e) , (
(1) As shown in Figure 1, thrust holding members 10 and 11 having a length of 7 mm on the operation side and 7 mm on the drive side are fixed to each door, and the short work roll L' is placed at a predetermined position inside the machine. It positions and holds it.

In this case, the work roll L' is shorter than the longest work roll L, so the length to be compensated (X'+Y') and its distribution lengths X', Y' are the above (X+Y) and X, Y.
The thrust holding member 10 is dimensionally longer than the
, 11 are calculated and manufactured in advance.Next, the parts related to the second invention mentioned above will be explained below using FIGS.

In the second invention, as shown in these drawings, only the operating side is structurally different compared to the first invention. As shown in FIG. 4C&), (1)), a cylinder 15 is supported by the access door 9 on the operation side, and the thrust presser member 10 is fixed to this cylinder head 16.

Figures (a) and (1)) in Figure 4 and (
Figure a) shows a state in which the longest work roll L is positioned and held at a predetermined position, but in the case of Figure 5 Φ), a work roll L' shorter than the longest work roll L is positioned at a predetermined position. This shows the state in which it is positioned and held.

In either case, a thrust holding member 11 having a uniformly distributed length R of the length to be compensated is fixed to the drive side door 8 so that the work rolls L and L' are positioned and held in a predetermined position. be done. However, a thrust holding member 10 is fixed to the access door 9 on the operation side, which can change the distribution length 2' of the length R-)-Z') to be compensated for because the work roll has become shorter. That's what I do.

That is, depending on the lengths L, L' of the work rolls to be incorporated, these work rolls 3 u, 3 (Z
.

Note that it is preferable to use a hydraulic cylinder as the cylinder 15, and although hydraulic equipment and push buttons for driving and operating the cylinder are not shown, they may be installed outside the multi-stage rolling mill main body 1.

[For production]

Although the device according to the present invention is configured as described above,
A method for positioning and holding work rolls of different lengths at predetermined positions inside the machine using this device will be described below.

In the first invention, first, the operation side door γ is opened, and the upper and lower work rolls 3u and 3d are temporarily loaded into the multi-high rolling mill from the operation side using the above-mentioned exchange cart type reassembly device. . At this stage, these work rolls have not yet been positioned at predetermined positions, but the drive side door 8
When the operating door 7 and the access door 9 provided on the door 7 are completely closed and the locking mechanism 14 is locked, these work rolls are automatically positioned at predetermined positions.

When the copper strip is passed through the machine to prepare for rolling or to actually perform cold rolling, the bearings 12 attached to the tips of the thrust holding members 10 and 11, which are fixed toward the machine interior, are attached to each work roll 3u. , 3d and rotate, each work roll is held without moving in the horizontal thrust direction.

However, in the apparatus according to the first invention, it is necessary to provide the multi-high rolling mill with thrust holding members 1o and ii, which have different lengths depending on the length of the work rolls to be incorporated. There remains the inconvenience and inefficiency of having to replace thrust holding members of different lengths each time the length of the work roll is changed as the width of the copper strip to be rolled is changed.

The second invention solves and improves this problem, but as shown in FIG. 5(a), when the longest work roll L is installed, it is positioned and held in the first invention You can do it exactly the same way. However, the same (′
b) When installing a work roll L' that is shorter than the longest work roll L as shown in the figure, close each door 7, 8, and 9 and lock the locking mechanism 14 before installing it outside the multi-high rolling mill main body 1. When a cylinder 15 in the machine is activated by pressing a push button, the upper and lower work rolls L' move horizontally and are automatically positioned and held at a predetermined position.

〔effect〕

As described above, the device according to the present invention has a simple configuration and operation, but unlike the conventional method in which unsafe adjustment work is performed manually, it has the following effects. .

a) Work rolls of different lengths temporarily loaded into a multi-high rolling mill can be accurately positioned and held at a predetermined position inside the mill by simply closing each door of the rolling mill or by pressing a push button after closing. Became.

b) Therefore, the workability of rearranging the work rolls has been greatly improved, and what used to be done by two people can now be done by one person.

C) Conventionally, this reassembly work took a long time to cleave, but in the first invention, it can be shortened to about 20 minutes, and in the second invention, it can be further shortened to less than 10 minutes, and rolling The work efficiency of the machine has been greatly improved.

d) In particular, if the device according to the second invention is used, there is no need to replace the thrust holding member, so safety can be sufficiently improved.

e) The outlay for manufacturing the device according to the invention is low.

[Brief explanation of the drawing]

Figures 1 to 5 show examples of the present invention, with Figure 1 being a front view of main parts showing a state in which work rolls of different lengths are installed in a predetermined position in a multi-high rolling mill, and Figure 2 showing the operation. FIG. 3 is an enlarged explanatory view of the main parts showing a state where the thrust presser member is fixed to the access door provided on the side door; FIG. 3 is an enlarged explanatory view of the main parts showing the state where the thrust presser member is fixed to the drive side door;
The figure is an enlarged explanatory view of main parts showing a state in which a thrust presser member that connects a cylinder to an access door on the operating side is fixed. FIG. 5 shows that a thrust holding member having a constant length R fixed to the drive side door and a thrust holding member with a cylinder fixed to the operation side access door are used to move the vehicle to a predetermined position within the multi-high rolling mill. FIG. 3 is an enlarged front view of main parts showing a state in which a work roll is installed in the machine. FIG. 6 is a schematic explanatory diagram showing an embodiment of a multi-high rolling mill for cold rolling a steel strip. 1: Multi-high rolling mill main body 2: Steel strip 3u: Upper work roll 3d: Lower work roll 4: First intermediate roll 5-second intermediate roll 6: Pack-up roll 7: Operation side door 8: Drive side door 9: Operation Access door provided on the side door 10 Ni-last presser member (operation side) 11 Ni-last presser member (drive side) 12 - Bearing 13: Bolt 14 Nice store lock mechanism 15 Niji cylinder 16: Cylinder head Patent applicant Nisshin Steel Co., Ltd. Figure 1 (b) Figure 2 Figure 4 Figure 6

Claims (5)

[Claims] (1) A device for positioning and holding work rolls of different lengths incorporated in a multi-high rolling mill at predetermined positions inside the machine, which distributes the length to be compensated according to the length of the work rolls incorporated. a thrust holding member having;
An in-machine positioning and holding device for work rolls of different lengths in a multi-high rolling mill, characterized in that the device is fixed to an access door and a drive-side door provided on an operation side door of the multi-high rolling mill so as to face inside the machine. (2) A device that positions and holds work rolls of different lengths installed in a multi-high rolling mill at predetermined positions inside the machine, with a fixed distribution of lengths to be compensated for depending on the length of the work rolls installed. A thrust holding member with a cylinder having a variable distribution length of the length to be compensated is connected to the drive side door, and a thrust holding member connected to a cylinder capable of changing the distribution length of the length to be compensated is attached to an access door provided on the operation side door, respectively, facing toward the inside of the machine. An in-machine positioning and holding device for work rolls of different lengths in a multi-high rolling mill, characterized in that they are fixed together. (3) An in-machine positioning and holding device for work rolls of different lengths in a multi-high rolling mill according to claims 1 and 2, wherein the multi-high rolling mill is a Sendzimir mill. (4) The multi-stage multi-stage according to claims 1 and 2, characterized in that a bearing that rotates in contact with the end surfaces of both the upper and lower work rolls installed is provided at the tip end of the thrust holding member. In-machine positioning and holding device for rolling mill work rolls of different lengths. (5) An in-machine positioning and holding device for work rolls of different lengths in a multi-high rolling mill according to claim 2, wherein the cylinder is a hydraulic cylinder.